The car service upstart said the 20 percent price cut for its lower-end uberX fleet would become permanent — despite protests from drivers who say it comes out of their pocket.

“Summer may have come and gone, but lower uberX prices are here to stay,” the company wrote in a blog posting on Thursday. “From Brooklyn to the Bronx, and everywhere in between, uberX is the most affordable ride in the city.”

An uberX ride from Williamsburg to the East Village costs $15, while the same taxi ride runs $16, according to the company.

In July, the fast-growing car service announced the “limited time” discount for uberX to undercut New York City yellow cabs and rivals such as Lyft.

The lower fares appear to be paying off for the company, but not its drivers. Last week, some staged a protest, including complaints about the lower uberX fares, at the company’s Queens office.